On this day 516 years ago, July 10, 1509 (June 24, 1509 lunar calendar), the birthday of the famous religious reform activist Calvin. John Calvin, French, famous religious reform activist, founder of Calvinism. Born on July 10, 1509 in the city of Noiron in Picardy, northern France, to a lawyer's family, his mother died unfortunately early. Calvin received his initiation education in a noble family in Noiron. In August 1523, the plague broke out in Noiron, and Calvin went to Paris with the children of the nobles to study at the Marche Institute of the University of Paris. Later, he entered the University of Paris for further study at Montague. In 1528, Calvin graduated with a master's degree in literature. By this time, the wind of the Lutheran Reformation had blown into the ancient campus, and some people expressed support for the Reformation, while the college leaders opposed it, and the struggle was fierce. In 1529, a student leader who supported Luther was burned to death. This struggle could not help but affect Calvin. In 1531, Calvin's father died, and he decided to go to Paris to specialize in theology. He studied the Greek, Hebrew, and Latin Bibles in Paris, demanding that the Roman Church be reformed in the face of ancient Christianity, and gradually inclined to the Reformation. Three years later, Calvin became a Protestant. In 1536, Calvin published his famous book "Principles of Christianity" in Basel, which systematically expounded Protestant doctrines and denied the authority of the Roman Pope. This book is a summary of his life's research on Protestantism and his religious and political activities in Geneva. It is one of the most influential Protestant encyclopedias of the Reformation. After 1541, he settled in Geneva for a long time and founded Calvinism. Therefore, Calvin was later called "the Pope of Protestantism". He persecuted many famous scholars, doctors and Anabaptists. Therefore, Engels once said angrily: "It is remarkable that Protestants have surpassed Catholics in persecuting the free research of natural scientists. Just as Servetus was about to discover the process of blood circulation, Calvin burned him to death and roasted him alive for two hours."